Saved login and password from one machine doesn't work on another
My wife is taking an on line qualification course. Her laptop PC is set up with most of what she needs and logs in to the on-line resources semi automatically. Yesterday she tried to access the on-line course resources from a Samsung tablet which failed dismally. On her laptop, going to the on-line resource page opens a typical log-in dialogue box with her user ID and password ready filled in and visible, hitting enter logs her in and everything is OK. Going to the same webpage on the tablet opens the same log-in dialogue for manual entry of the ID and PW but, when entered it responds with "invalid information" and fails to log-in. It fails in a similar way on my Linux Mint laptop. I made the mistake of clicking the password save option on my Mint laptop before it failed to go in but at least we can see we entered it correctly in the password manager.
Is there any way that her PC is using a different ID and /or PW to the one it autofills in the diaglogue box? Something doesn't stack up.
Help, please....